A measuring device is equipped with: an image capture unit for capturing reflected images of a prescribed pattern at the front surface and the rear surface of a transparent object to be measured; and a computing unit for using reflected images captured by the image capture unit to calculate the position of the front surface or the rear surface in the thickness direction. The prescribed pattern includes a plurality of elements, each element of the plurality of elements having a first end and another end which are formed in a direction orthogonal to the direction of extension of the pattern, and which are mutually offset in thedirection of extension.